Clones burn-out fast

[Sam]

Isn't Kon already show little age?

[Super-Teacher]

The Superman Robots became inactive in the early 70s due to the pollution content in the air (Why didnt Supes just use a charcol filter?)

I always wondered why Superman didnt use Braniac 5's short-lived clones as tempory replacement for the robots.

[Just a fan]

ok I guess I've been out of the loop on S-boy I just picked up Superman/Batman #7, and found out that Conner is 50% Luthor?  When did this happen and how?what's the other 50%?